1993 GMC Sierra Owners Manual

The proper fluids and lubricants whoever services your vehicle uses these. All parts should be replaced and all necessary repairs done before you or anyone else drives the vehicle. SG OR -ALWAYS USE II OILS OF THE PROPER

SGKE QUALITY, ENERGY CONSERVING VISCOSITY. To determine the preferred viscosity oil for your vehicle’s engine (e.g. SAE 5W-30

to use are listed in this section. Make sure

1. ENGINE OIL AND OIL FILTER CHANGE*

or 10W-30), see “Engine Oil” -Lubricate

the front suspension, king

in the Index. pin

2. CHASSIS LUBRICATION

bushings, steering linkage, transmission, and transfer case shift linkage, parking brake cable guides, propshaft splines (2 wheel drive), brake pedal springs, and clutch pedal springs at the intervals specified. If you have a 3500 HD, lubricate the king pins and king pin bushings (2500 km) for Maintenance Schedule 1, or every 3,000 every 1,500 miles (5000 km) for Maintenance Schedule Ball joints and king temperature is 10°F (-12”C), or higher. When the weather them warm up before lubrication or they could be damaged. all the vehicle fluid levels at this Also, be sure to check

pin bushings should not be lubricated unless their

2.

is cold, let

time. the clutch fork

3. CLUTCH FORK BALL STUD LUBRICATION

-Lubricate

on the clutch housing. Lubricant must be

ball stud through the fitting added “sparingly” to the fitting, as only. 0066 Ib. (.003 kg) is required lubricate the ball stud surface. intervals in the Maintenance Charts. the clutch assembly.

Do not add lubricant more often than the Too much lubricant will damage

to

4. ENGINE IDLE SPEED ADJUSTMENT (DIESEL ENGINES)*

-Adjust

to

the specifications shown on the underhood label. calibrated test equipment.

You must use

5. COOLING SYSTEM SERVICE*

flush and refill system with new -Drain, in the Index for the proper coolant and

coolant. See “Engine Coolant’’ mixture to use in your vehicle. Also inspect the hoses and replace them deteriorated. Tighten all hose clamps (except constant tension clamps). Remove debris and clean the outside of the radiator and air conditioning the radiator neck. To ensure proper operation, pressure condenser. Wash test the radiator and * An Emission Control Service

if they are cracked, swollen, or

cap.

7-1 8

6. AIR CLEANER FILTER REPLACEMENT*

-Replace at every

miles (50 000 km) or more often under dusty conditions. Ask your dealer for the proper replacement intervals for your driving conditions.

30,000

7. FRONT WHEEL BEARING REPACK

(2 WHEEL DRIVE ONLY)

-Clean

and repack the front wheel bearings at each brake relining, or at the specified interval, whichever comes first.

8. TRANSMISSION SERVICE

Automatic Transmission -Change 15,000 miles (25 000 km) for vehicles under 8,600 GVWR or every 12,000 miles (20 000 km) for vehicles over 8,600 GVWR is mainly driven under one or more

the transmission fluid and filter every

of these conditions:

if the vehicle

In heavy city traffic. Where the outside temperature regularly reaches 90°F (32°C) or higher. In hilly or mountainous terrain. Frequent trailer pulling. Uses such as taxi, police, delivery or other commercial service.

of these conditions, change

(50 000 km) for vehicles under 24,000 miles (40 000 km) for vehicles over 8600

If the vehicle is not used mainly under any the fluid and filter every 30,000 miles 8600 GVWR or every GVWR. See “Automatic Transmission Fluid” information. Manual Transmission -Transmission fluid does not require periodic changing.

in the Index for more

9. CDRV SYSTEM INSPECTION*

-Check

the Crankcase Depression

Regulator Valve System for any worn, plugged or the system checked as described 10. FUEL FILTER REPLACEMENT* interval or sooner if clogged.

in the Service Manual. -Replace

the fuel filter at the specified

collapsed hoses. Have

11. SPARK PLUGS REPLACEMENT*

-Replace spark

listed in Section 6. See “Specification Charts”

in the Index.

plugs with the type

12. SPARK PLUG WIRE INSPECTION* -Clean wires

cracks or other damage. Check the wire boot fit at the spark plugs. Replace wires as needed. *An Emission Control Service

and inspect for burns, the distributor and at

7-1 9

Scheduled Maintenance Services

13. EGR SYSTEM

INSPECTION* -Conduct EGR SYSTEM CHECK as

described in the Service Manual.

14. ELECTRONIC VACUUM REGULATOR VALVE (EVRV)

filter for excessive contamination or plugging.

INSPECTION* If required, clean

of biodegradable soap and water, let

dry and

-Inspect element with a solution reinstall element.

15. ENGINE TIMING CHECK AND DISTRIBUTOR CHECK (SOME

MODELS)” -Adjust inside and outside of the distributor cap and rotor for cracks, carbon tracking and corrosion. Clean or replace as needed.

timing to underhood label specifications. Inspect the

16. FUEL TANK, CAP AND

LINES INSPECTION* -Inspect

the fuel tank,

cap and lines for damage or leaks. Remove fuel cap, inspect gasket for an even filler neck imprint, and any damage. Replace parts as needed. 17. THERMOSTATICALLY CONTROLLED AIR CLEANER INSPECTION*

A-(If so equipped.) Inspect all hoses and ducts for proper hookup. Make sure valve works properly.

18. ENGINE ACCESSORY DRIVE BELT(S) INSPECTION*

--Inspect belts.

and proper tension. Adjust or replace as

Look for cracks, fraying, wear, needed.

19. EVAPORATIVE CONTROL SYSTEM (ECS) INSPECTION*

-Check all

fuel and vapor lines and hoses for proper hookup, routing, and condition. Check that the purge valve works properly, needed.

if equipped. Replace as

20. SHIELDS AND UNDERHOOD INSULATION INSPECTION

shields and underhood insulation for damage or looseness. Adjust or replace as required.

Am-Inspect

21. AIR INTAKE SYSTEM

INSPECTlONAWCheck the air intake system

installation to see that gaskets are seated properly and all hose connections, fasteners, and other components sure that the air cleaner housing is properly seated, that the cover fits tightly, and the wing nuts are tight. Tighten connections and fasteners or replace damaged parts as required.

are tight. Also check

to be

22. THERMOSTATICALLY CONTROLLED ENGINE COOLING FAN

so equipped.) With the engine

INSPECTI0NA.-(If normal operating temperature, check by hand on fluid coupling or viscous drives. Replace as necessary. *An Emission Control Service AAlso a Noise Emission Control Service .Applicable only

to vehicles sold in the United States

off and below to see that the fan can be rotated

7-20

23. EXHAUST PRESSURE REGULATOR VALVE

INSPECTION* -Check

that

the valve works properly. Correct any binding. Inspect hoses for cracks, chafing or decay. Replace parts as needed.

24. TIRE AND WHEEL ROTATION AND INSPECTION

-For proper wear

6,000 miles (1 0 000

000 kilometers) in Section 6.

I (t) or 7,500 miles (12 500 kilometers) for

and maximum tire life, rotate tires at the first kilometers) for Schedule Schedule II (.) and then every 15,000 miles (25 thereafter. Follow the instructions and patterns shown Check tires for uneven wear or damage. apparent, check wheel alignment. Also, check for damaged wheels. See “Tires” in the Index for more information. For dual wheels, whenever the vehicle, wheels, or fasteners have the wheel fastener torque set at miles (160, 1600 and For 3500 H.D. Models, block keep the vehicle from rolling.

10 000 km).

the tires opposite those being removed to

are new, the first 100, 1,000 and 6,000

If irregular or premature wear

25. DRIVE AXLE SERVICE

-Check

readfront axle fluid level and add

needed. Check constant velocity joints and axle seals for leaking.

as

is

oil changes. In dusty

Locking differential-Drain fluid at first oil change and refill. Check fluid level and add as needed at subsequent areas, or trailer towing applications drain fluid at every 15,000 miles (24 135 kilometers) and Standard differential -Check every oil change. fluid every 15,000 miles (24 135 kilometers) and refi1l.t More frequent lubrication may be use.

fluid level and add as needed at

refill$

In dusty areas, or trailer towing applications, drain

required on heavy-duty or off-road

26. BRAKE SYSTEM INSPECTION

-When

the engine oil is changed,

parking brake adjustment, and the

inspect the lines and hoses for proper hookup, binding, leaks, cracks, chafing, etc. Check the the master cylinder. A low fluid level can indicate worn disc brake pads which may need *An Emission Control Service t A fluid loss in these systems may indicate inspected and repaired at once.

a problem. Have them

to be sewiced.t

fluid level in

7-2 1

Scheduled Maintenance Sewices

or dirt from the wheel and

Also inspect drum brake linings for wear and

to help ensure proper safety, emission performance, and

if driving habits or conditions resull In

When the wheels are removed for rotation, inspect disc brake pads for wear and rotors for surface condition. cracks. Inspect other brake parts, including drums, wheel cylinders, parking brake, etc., at the same time. Remove any rust mounting surfaces before mounting the wheel. Inspect brakes more often frequent braking. Owner Checks and Services Listed below are owner checks and services which should be made at the time period specified dependability of your vehicle. Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added as shown At Least Once a Month Tire inflation pressure check -Check are low, tire inflation charts. See “Loading Your Vehicle’’ or the Index. At Least Once a Year Key lock cylinder lubrication See the “Recommended Fluid and Lubricants’’ chart Transmission neutral or clutch start switch operation CAUTION

inflate them to the level specified on the certification label

in this Section.

in this section.

-Lubricate key lock cylinders with engine oil.

to your vehicle, make sure they are the proper ones,

the tires for proper inflation. If they

or on “Inflation-Tire Pressure”

the in

1. Before you start, be sure you have enough room around the vehicle. 2. Firmly apply both

the manual parking brake and the regular brake. See

“Brakes” and “Parking Brake” in the Index. pedal.

Do not use the accelerator

3. Be ready 4. On automatic transmission vehicles,

to turn off the engine immediately

The starter should work only

try to start the engine in P (Park) or N (Neutral).

if it starts.

in each gear.

7-22

Lock

in N (Neutral), push the

try to start the engine. The starter should work only

all the way to the floor. -While parked, try to turn the key to

On manual transmission vehicles, put the shift lever clutch down halfway, and when the clutch is pushed down Steering column lock operation in each gear shift position. With an automatic transmission, the key should turn to gear shift is in P (Park). On vehicles with a key release lever, try pressing the lever. The key should depressed. On all vehicles, the key should come out only in Parking brake and transmission P (PARK) mechanism operation - CAUTION 4 When you are doing this check, your vehicle could begin to move.

turn to Lock only with the key lever

Lock only when the

to turn the key to

Lock without

You or others could be injured and property could be damaged. Make sure there is room in front of your vehicle in case you begin to roll. Be ready to apply the regular brake at once should the vehicle begin to move.

Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the manual parking brake.

Lock.

To check the parking brake: With the engine running and the transmission in N (Neutral), slowly remove foot pressure brake pedal. Do this until the vehicle To check the “Park” mechanism’s holding ability: Apply the regular brake and shift to P (Park). Release the manual parking brake, then slowly release the regular brake.

is held by the parking brake only.

from the regular

-Inspect belt system,

if the webbing has been cut

Lap and shoulder belts condition and operation including: webbing, buckles, latch plates, retractors, guide loops and anchors. Have a belt assembly replaced damaged. Body Lubrication Service -Lubricate all body door hinges with engine oil. Also lubricate the tailgate, tailgate handle pivot points, and tailgate mounted spare tire carrier (if equipped). Lubricate the body hood, compartment hinges, latches and locks including interior glove console doors, and any pivot and prop exposed to a corrosive environment.

folding seat hardware. Lubricate the hood safety lever rod pivot. More frequent lubrication may be required when

fuel door and rear

or otherwise

box and

7-23

Scheduled Maintenance Services

front and rear suspension of wear or

Periodic Maintenance Inspections Listed below are inspections and services which should be performed at least You should let your GM twice a year (for instance each spring or fall). dealer’s service department or other qualified service center do these jobs. Make sure any necessary repairs are completed at once. Steering and Suspension lnspectiont -Inspect and steering system for damaged, loose or missing parts, signs lack of lubrication. Inspect power steering lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. (On vehicles equipped with manual for seal steering gear, check leakage.) Lubricate the steering linkage. Accelerator Control System -Lubricate all pivot points with engine oil, except the TBI throttle shaft. Remove all external deposits from the injector Do this when the engine pump face cam on 6.2L and 6.5L engines. and not running. Do not oil any accelerator or cruise control cables. Replace any cables that have high effort or excessive wear. the complete system including the Exhaust System Inspection three-way catalytic converter. Inspect the body near the exhaust system. Look for broken, damaged, missing or out-of-position parts, as well as, open seams, holes, loose connections or other conditions which could cause a heat buildup in the floor pan or compartments. Drive Axle Service Check constant velocity joints and axle seals for leaking. Transfer Case (four-wheel drive) change intervals, check front axle and transfer case and add lubricant when necessary. Oil the control lever pivot point and all exposed control linkage. Check vent hose at transfer case for kinks and proper installation. More frequent lubrication may be required on heavy-duty t A fluid loss in these systems may indicate a problem. Have them inspected and repaired at once.

could let exhaust fumes seep into the passenger

readfront axle fluid level and add as needed.

or off-road use.

lnspectiont -Every 12 months or at oil

-Inspect

-Check

is cold

7-24

Recommended Fluids & Lubricants NOTE: Fluids and lubricants identified below specification may be obtained from your

by name, part number or

GM Dealer.

USAGE

Engine Oil

Engine Coolant

Hydraulic Clutch System Hydraulic Brake Systems

Parking Brake Cables

Power Steering System

Manual Steering Gear Automatic Transmission

Manual Transmission: a. 5-Speed with Low Gear

SG

I GM Goodwrench Motor Oil or equivalent for API Service

FLUID/LUBRICANT

No. 12345347 or equivalent).

glycol base to GM-6038-M (GM Part No. 1052103).

or SGlCE of the recommended viscositv. Mixture of water and a good quality ethylene antifreeze conforming Hydraulic Clutch Fluid (GM Part Delco Supreme 11 @ brake fluid (GM Part No. 1052535 or DOT-3). Chassis grease meeting requirements of Catagory LB or GC-LB (GM Part No. 1052497). GM Power Steering equivalent conforming to GM spec 9985010. GM Lubricant (GM Part No. 1052182) or equivalent. DEXRONB HE Automatic Transmission Fluid (GM Part No. 1051 855l.

Fluid (GM Part No. 1050017) or

NLGl Grade 2,

a. CastrolB Syntorq or equivalent (GM Part No.

1 2346074).

b. 5-Speed without Low Gear

b. Standard Transmission

Fluid (GM Part No. 12345349).

Differential:

a. Standard (Saginaw) Front

and Rear Axle

b. Locking Transfer Case

Gas Line Weather Strips Column Shift, Transfer Case Shift Lever, and Propeller Shaft. Clutch Fork Ball Stud

a. SAE-80W-90 gear lubricant (GM Part

No. 1052271).

b. SAE-80W-90 gear lubricant (GM Part

No. 1052271). DexronB IIE Automatic Transmission Fluid (GM Part No. 12345881). Gas Line De-lcer (GM Part No. 1051516). Spray-A-Squeek (GM Part No. 1052277). Chassis grease meeting requirements Category LB or GC-LB (GM Part Chassis grease meeting requirements Category LB or GC-LB (GM Part

of NLGl Grade 2,

of NLGl Grade 2,

No. 1052497).

No. 1052497).

(Continued next page^ TO391

7-25

Scheduled Maintenance Services

Recommended Fluids & Lubricants

Hood Latch Assembly

a. Pivots and spring anchor b. Release Pawl

Front Wheel Bearings

Propeller Shaft Spline/Universal Joint

Automatic Transmission Shift Linkage, Floor Shift Linkage, Hood and Door Hinges, Body Door Hinge Pins, Tailgate Hinge and Linkage, Folding Seat, Fuel Door Hinge Key Lock Cylinders

Zhassis Lubrication

Windshield Washer Solvent

and Anti-Freeze

Neatherstrip

M e r Tailgate Handle Pivot Points

a. Engine oil (GM Part No. 1050109). b. Chassis grease meeting requirements

GM-6031-M (GM Part No. 1052497).

of

Chassis grease meeting requirements Grade 2, Category LB or GC-LB (GM Part 1052497). Chassis grease meeting requirements GM-6031-M (GM Part No. 1052497) Engine oil

of NLGl No.

of

of

Use regular engine oil or a synthetic light weight engine oil (SAE 5W-30). Chassis grease meeting requirements GM-6031 (GM Part No. 10524971. GM Optikleen washer solvent (GM 1051515) or equivalent. Silicone grease (GM Part No. 12345579) or equivalent. Multi-purpose lubricant meeting requirements of GM Part No. 12345120.

Part No.

TO392

7-26

Maintenance Record After each of the preceding Scheduled Maintenance Services record the date, odometer reading, services performed (list item numbers) and who performed the services in the appropriate column. In addition, retain copies of your receipts. Owner's Manual.

It is suggested that receipts be kept with your

is performed,

TO260

7-27

Scheduled Maintenance Services

Service Station Checks It is important for you or a service station attendant to perform these under-hood checks at each fuel

fill.

Check the engine oil level and add Check the engine coolant level necessary. Check the windshield washer fluid level and add

if necessary.

in the recovery bottle and add

if

if necessary. to check them.

See these items in the Index

for information on how

7-28

L

7-29

PO209

.

. .

. ' I I ?

. " C

Customer Assistance Information Section

how to obtain service publications and

if you need assistance. how to

Here you will find out how to contact GMC Truck This section also tells you report any safety defects. Customer Satisfaction Procedure ......................................................................... 8-2 ........................................... 8-3 Customer Assistance for HearinglSpeech Impaired GM Participation in Better Business Bureau MediatiodArbitration Program .... 8-3 Reporting Safety Defects ...................................................................................... 8-4 Roadside Assistance ............................................................................................ .8-5 Service Publications .............................................................................................. 8-6

8-1

Customer Assistance Information

of your

to your

to your dealer and GMC Truck.

of Dealership Management, it

If your concern has not been resolved

Customer Satisfaction Procedure Your satisfaction and goodwill are important Normally, any concerns with the sales transaction or the operation vehicle will be resolved by your dealer’s Sales or Service Departments. Sometimes, however, despite the best intentions of all concerned, misunderstandings can occur. satisfaction, the following steps should be taken: STEP ONE -Discuss your concern with a member of dealership management. Complaints can often be quickly resolved at that level. If the matter has already been reviewed with the Sales, Sewice, or Parts Manager, contact the owner of the dealership or the General Manager. STEP TWO -If after contacting a member appears your concern cannot be resolved by the dealership without further help, contact the GMC Truck Consumer Relations Manager by calling 1-800-GMC-TRUCK (1 -800-462-8782). In Canada, contact the GM of Canada Customer Assistance Center in Oshawa by calling 1-800-263-3777 (English) or 1-800-263-7854 (French). In Mexico, call (525) 254-3777. In Puerto Rico or 1-809-763-1315. In all other overseas locations, contact GM International Export Sales in Canada by calling 1-41 6-644-4112. For prompt assistance, please have the following information available the Customer Assistance Representative: Your name, address, telephone number Vehicle Identification Number (This is available from the vehicle registration or title, or the plate attached panel and visible through the windshield). Dealership name and location Vehicle delivery date and present mileage Nature of concern

U S . Virgin Islands, call

We encourage you to call the toll-free number listed previously give your inquiry prompt attention. Information on offices outside the which can assist you can also Assistance Information booklet. If you need writing: GMC Truck, 48342-2230.

to contact us

in writing, please contact Consumer Relations by

31 E. Judson Street 1607-07, Pontiac, Michigan

be found in the Warranty and Owner

in order to U. S.

8-2

to the left top of the instrument

to give

if you have a

When contacting GMC Truck, please remember that your concern will likely be resolved in the dealership, using the dealership’s facilities, equipment and personnel. That is why we suggest you follow Step One first concern. Customer Assistance for the Hearing or Speech Impaired (TDD) To assist owners who have hearing difficulties, GMC Truck has installed special TDD (Telecommunications Devices for the Deaf) equipment at its Customer Assistance Center. Any hearing or speech impaired customer who has access to a TDD or conventional teletypewriter (TTY) can communicate with GMC Truck by dialing: In the United States ..................................................................... 1 -800-GMC-TKTD In Canada ......................................................................................... 1-800-263-3830. GM Participation in Better Business Bureau Mediation/Arbitration Program* *This program may not be available in all states, depending on state law. Canadian owners refer to your Warranty and Owner Assistance Information booklet. General Motors reserves the right to change eligibility limitations and/or to discontinue its participation in this program. Our experience has shown that the Customer Satisfaction Procedure described earlier in this section has been very successful in achieving customer satisfaction. However, GMC Truck wants you to be aware of GM’s voluntary participation in a no-charge mediationlarbitration program called BBB is administered by the Council Better Business Bureaus. The program can resolve individual disputes involving vehicle repairs and the interpretation Warranty. We prefer that you not resort to BBB AUTO LINE until after a final .decision is made under the Customer Satisfaction Procedure. However, you may file a claim at any time by contacting your local Better Business Bureau (BBB) at the following toll-free number: 1-800-955-5100. For further information about filing a claim, you may also write to: BBB AUTO Business Bureaus, 4200 Wilson Boulevard, Suite 800, Arlington, Virginia 22203.

if you have not been substantially satisfied,

of Better Business Bureaus through local

of your New Vehicle Limited

AUTO LINE. This program

LINE, Council of Better

8-3

Customer Assistance Information

to

of resorting to the

47 days if you did not

to go to court, however, we

40 days from the time you file

to use this program before or instead

to provide your name and address, the

informal (lawyers are not usually if you choose).

to duplicate the functions of courts by strictly applying state

In order to file a claim, you will have vehicle identification number (VIN) of your vehicle, and a statement of the try to help resolve your dispute nature of your complaint. BBB staff may through mediation. If mediation is not successful, or if you do not wish participate in mediation, eligible customers may present their case to an impartial third-party arbitrator at an informal hearing. The arbitrator will render If you accept a a decision in your case, which you may accept or reject. valid arbitrator decision, GM will be bound by that decision. The entire dispute settlement process should ordinarily take about your complaint to the time a decision is rendered (or first contact your dealer or GMC Truck). We encourage you courts. We believe it offers advantages over courts in most jurisdictions because it is fast, free of charge, and present, although you may retain one at your expense Arbitrators make decisions based on the principals of fairness and equity, and are not required or federal law. If you wish you first file a claim with BBB otherwise. Whatever your preference may be, remember that unhappy with the results because an arbitrator’s decision accept it. Eligibility is limited by vehicle agelmileage and other factors. For further information concerning the program, call the BBB at 1-800-955-5100. also call GMC Truck’s Customer Relations Manager. *Some states may require that you file a claim with BBB AUTO LINE before resorting to state-operated procedures (including court), Reporting Safety Defects to the United If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA), Motors. If NHTSA receives similar complaints, finds that a safety defect exists and remedy campaign. However, NHTSA cannot become involved problems between you, your dealer, or General Motors.

Ites Government

is binding on GM but not on you, unless you

AUTO LINE* unless state law provides

it may open an investigation, and

if you are still go to court

of BBB AUTO LINE, you can

in a group of vehicles,

it may order a recall

do not require that

You may

if it

in addition to notifying General

in individual

8-4

or write to:

in a situation like this.

To contact NHTSA, you may either call the Auto Safety Hotline toll-free at 1-800-424-9393 (or 366-0123 in the Washington, D.C. area) NHTSA, U.S. Department of Transportation, Washington, D.C. 20590. You can also obtain other information about motor vehicle safety from the Hotline. Reporting Safety Defects to the Canadian Government If you live in Canada, and you believe that your vehicle has a safety defect, you should immediately notify Transport Canada, in addition to notifying General Motors of Canada Limited. You may write to: Transport Canada at Box 8880, Ottawa, Ontario K1G 3J2. Reporting Safety Defects to General Motors In addition to notifying NHTSA (or Transport Canada) we certainly hope you'll notify us. Please call us at 1-800-GMC-TRUCK (1-800-462-8782), or write: GMC Truck, Consumer Relations, 31 Street 1607-07, Pontiac, Michigan 48342-2230. In Canada, please call us at 1-800-263-3777 (English) or 1-800-263-7854 (French). Or, write: General Motors of Canada Limited, Customer Assistance Center, 1908 Colonel Sam Drive, Oshawa, Ontario L1H 8P7. Roadside Assistance GMC Truck's Roadside Assistance provides stranded owners with over-the-phone roadside repairs or towing service for disabled vehicles. This service combines the efforts with a network of GMC Truck's dealer services. Just dial GMC Truck Roadside Assistance at 1-800-GMC-TRUCK (1 -800-462-8782) to reach a qualified representative who can assist you repair or arrange a tow. Other recommended services can also be arranged for situations such as retrieving locked-in keys, changing a tire, or delivering to the owner. We also provide dealer information at gasoline, at a charge charge such as location of the nearest operation. Roadside Assistance is available 24 hours a day, seven days a week, 365 days a year, including weekends and holidays. Should you have any questions about Roadside assistance, call the GMC Truck Roadside Assistance Center or Contact your dealer. In Canada, call 1-800-268-6800 for details on Roadside Assistance.

of technically trained telephone representatives

no and their hours of

GMC Truck dealer

E. Judson

in

8-5

Customer Assistance Information

of

L1 H 8P7.

US. states (and the GVWR less than 10,000

of Canada Limited, Service

if done on time with the latest parts, may avoid future costly

Service Publications Information on how to obtain Product Service Publications, Subscriptions and Indexes as described below is applicable only in the fifty District of Columbia) and only for light trucks with pounds (4536 kg). In Canada, information pertaining to Product Service Bulletins and Indexes can be obtained by writing to: General Motors Publications Department, 1908 Colonel Sam Dr., Oshawa, Ontario GMC Truck regularly sends its dealers useful service bulletins about GMC Truck products. GMC Truck monitors product performance in the field. We then prepare bulletins for servicing our products better. Now, you can get these bulletins too. Bulletins cover various subjects. Some pertain to the proper use and care your vehicle. Some describe costly repairs. Others describe inexpensive repairs which, repairs. Some bulletins tell a technician how to repair a new or unexpected condition. Others describe a quicker way to technician service your vehicle better. Most bulletins apply GMC Truck dealer or a qualified technician may have specific bulletin applies to your vehicle. You can subscribe to all GMC Truck bulletins. This way you’ll get them as they come out. You can wait a while and get an index to the bulletins. You can also get individual bulletins. However, you’ll need the index to identify them. Subscriptions You can subscribe to all GMC Truck Product Service Publications (PSP’s). This will include bulletins for all light trucks (less than GVWR) sold by GMC Truck will receive the PSP’s in particular model. When you buy a subscription, you A subscription costs US. periodic mailings, shortly after they come out. $75,00 ($85.00 including a special binder) and it entitles you to all PSP’s published by GMC Truck during the model year. You can purchase a subscription by sending a check or money order to Publications, Post Office Box 436006, Pontiac, Michigan 48343 along with the order form located at the end subscription ordering forms by calling the toll-free number shown in this section, or you can find them

to conditions affecting a small number of trucks. Your to determine if a

and will not be limited to PSP’s applicable to any

of this section. You may get additional

fix your vehicle. They can help a

at participating dealerships.

GMC Truck Service

10,000 Ibs. [4536 kg]

8-6

to buy all the PSP’s issued by GMC Truck for all models as those which may

Individual PSP’S If you don’t want the model year, you can buy individual PSP’s, such pertain to a particular model. of PSP’s. It provides a variety of information. Here’s what you’ll find in the index and how you can get one: What You’ll Find in the Index:

this, you will first need

To do

to see our index

in

A list of all PSP’s published by GMC Truck later). PSP’s covering all models in the same index. 10,000 pounds [4536 kg] GVWR) are listed Ordering information so you can buy the specific PSP’s you may want. Price information for the

PSP’s you may want

of GMC Truck

to buy.

in a model year (1989 or

light trucks (less than

could potentially most recent

to wait until the in

of the PSP’s which

if you are interested

How You Can Get an Index: Indexes are published periodically. Most apply to the most recent GMC Truck models will be listed in the publication for that model year. This means you may want end of the model year before ordering an index, buying PSP’s pertaining to a current model year truck. Some PSP’s pertaining to a particular model year vehicle may be published later years, and these would be listed order an index for a model year that is not over yet, we’ll send you the most recently published issue. Check the ordering form for indexes for earlier model years. then see Cut out the ordering form, an index is mailed to you. There is no charge for indexes for the 1989-1 993 model years. Toll-Free Telephone Number If you want an call toll-free and we’ll be happy equipment will take your name and mailing address. The number 1-800-551 -41 23.

additional ordering form for an index or a subscription, just to send you one. Automated recording

fill it out, and mail

it in. We will

in the later year’s index. When you

to call is

to it that

in

8-7

Customer Assistance haformation

GMC Truck

These PSP’s are meant for technicians.

Copies at Participaiing Dealers Copies of Indexes and individual PSP’s are at your participating to see them. dealer. You can ask A VERY IMPORTANT REMINDER: They are not meant for the “do-it-yourselfer,” Technicians have the equipment, tools, safety instructions, and know-how to do a job quickly and safely. GMC Truck reserves the right November, 1 992. GMC Truck Service Publications You can get these Product Service Publications by using the order form at the end of this section. You can also get Service Manuals and Owner Publications.

to change these procedures without notice after

8-8

t

1993 SERVICE PUBLICATIONS

ORDERING INFORMATION

You can get manuals that tell how to operate and service your vehicle. To order them, fill out the order form on the next page and send the address below.

GMC Truck Service Publications

Post Office Box 436006

Pontiac, MI 48343

it to

If you have questions or would like to order using your credit card,

us TOLL FREE at 1-800-627-5699.

call

From outside the Continental United States, please call 1-313-455-8016

GLOVE BOX LITERATURE FOR YOUR SIERRA

Manual

Manual Owner’s Manual Warranty Vehicle Storage

Manual You can also order the Glove Box Literature includes all of these publications. costs $1 4.00.

$5.50 $2.00 in a vinyl pottfolio which

x-01 01

Ask for form number 15690052-it

SERVICE MANUALS FOR ALL LIGHT DUTY TRUCKS

*Includes Fuel and Emissions Manual X-9336

81 PIG

X-9332

Model 1993 C/K Models X-9331 1993 G Van $64.00 Models

1993

1993 1993 S/T Models There are other service manuals you can buy that cover the electrical systems and unit repair. Call us to get a catalogue listing of manuals.

x-9357

X-9329

PRODUCT SERVICE PUBLICATIONS

$62.00

P3

Form

PSP

Index

Year Index Year

Year Index Year

Description

* 1990 Model 1991 Model 1992 Model 1993 Model 1993 Model Year Product Service Publication Subscription Above Subscription With Binder Binder Only

Index

PSP

PSP I 90 I 91 PSP I 92 I 93

Free Free Free Free

PSP 93 PSP 93B PSP

Price*

$70.00

$6 1 .OO

all these

$75.00 $85.00 $1 5.00

Prices subject to change without notice.

i

I I

0 0 0

0 a

lA

I-

I

.. .

I1

cl

(3 I P

-*

. %

I E

ui b G 9)

v) v)

92 w X

1 I

A

6-54

Battery ........................................... Belts (See "Safety Belts") Better Business Bureau Mediation 8-3 Bliizard .......................................... 4-54 Brakes 'Adjustment ................................. 4-19 Antilock ...................................... 4-16 Fluid ........................................... . 6.49 Leak Check ............................... 6-52 Master Cylinder ........................ 6-49 Parking ....................................... 2-29 Pedal Travel .............................. 4-19 Rear Drum ..... ; .......................... 4-19 Replacing Parts ........................ 6-50 .2.79, 4-18 System Warning Light Trailer ......................................... 4-58 Wear Indicators ........................ 4-18 Braking ....................................... .'.'4.14 In Emergencies ........................ 4-19 Break.ln, New Vehicle ; ................ 2.10 Bulb Replacement ............. 6.54, 6-98 .................. 6-98 Replacement Chart

9-1

C

Camper Wiring Harness .............. 2-91 Capacities/Specification Charts .. 6-95 Cassette Tape Player (See “Audio Systems”) Catalytic Converter ...................... 6-65 Certificationnire Label ................. 6-67 Changing A Flat Tire ........ 5.17. 5-23 Chemical Paint Spotting .............. 6-90 Child Restraints (See “Safety Belts”) Cigarette Lighter/Ashtrays ........... 2-62 Circuit Breakers (See “Fuses”) Cleaning Finish Care ................................ 6-88 Glass .......................................... 6-87 Inside of Vehicle ....................... 6-85 Instrument Panel. Top ............. 6-87 Outside of Vehicle .................... 6-88 Special Problems ...................... 6-86 Vinyl or Leather ........................ 6-87 Wheels and Tires ..................... 6-89 Windshield ................................ 6-88 3-1 2. 3-1 5 Clock ................................... Computer Command Control System ..................................... 6-66 Conversion to Chassis Cab ........ 6-72 Coolant (See “Engine”) Cooling System ............................ 5-1 1 Capacity .................................... 6-96 Crankcase Capacity ...................... 6-96 Cruise Control ............................... 2-47 Increase Speed ......................... 2.50 On Hills ...................................... 2-51 Passing ...................................... 2-51 Reduce Speed .......................... 2-51 Resume ..................................... 2-49 Set .............................................. 2-48 .......................... To Get Out Of 2-52 Cup Holder .................................... 2-65 Customer Assistance for the Hearing or Speech Impaired .... 8-3 Customer Satisfaction Procedure.8-2

9-2

2-56 2-5 2-6

Daytime Running Lights (Canada Only) .................... 2.55. 2-84 Indicator Light ............... 2.55. 2-84 Diesel Fuel (See “Fuel”) Dome Lights ................................. Doors ............................................... Locks ............................................ Driving Across an Incline ..................... 4-33 After Off-Road Driving ............ 4-36 At Night .......................... 4.36. 4-38 Backing Up ............................... 4-59 Defensive ................................... 4-10 Downhill ..................................... 4-31 Freeway ..................................... 4-43 High Beams .............................. 4-37 Highway Hypnosis ................... 4-46 Hydroplaning ............................. 4-39 In Blizzard ................................. 4-54 In City ....................................... 4-42 In Fog. Mist and Haze In Rain ............................ In Sand. Mud. Ice. Or Snow .................................. 4-34 In Water .................................... 4-35 Long Distance .......................... 4-45 Loss of Control ........................ 4-24 Night Vision .............................. 4-37 Off-Roading ............................... 4-25 On Curves ................................. 4-20 On Grades ................................. 4-60 . 4-47 On Hill and Mountain Roads On Off-Road Hills .................... 4-28 On Snow or Ice .. 2.15. 4.52. 4-55 Passing ............................ 4.22. 4-59 Skidding ..................................... 4-24 Stuck in Deep Snow ..... 4.54. 5-33 Through Water .............. 2.15. 4-35 Uphill .......................................... 4-29 Winter ........................................ 4-52 With a Trailer ............................ 4-55 Drunken Driving ........................... 4-11

. 4.41 . 4-42

4.38. 4-40

6-44 6-31 6-26

... Engine

Add-on Equipment ................... 6-94 I- Electronic Heatinghir Conditioning (See "Heating") Adding Coolant ... 5.12, 5.14. Air Cleaner ................................ Block Heater .......... 2.19. 3.5. Cold Weather Starting (Diesel) .................... 2-1 7 Coolant ....... 5.12. 5-1 4. 6.42. 6-96 Coolant Temperature Gage ...... 2-88 Diesel ................................ 6.6. 6-1 9 Crankcase .................................. 6-96 Exhaust ........................... 2.34, 6-65 Fan Noise .................................. 5-1 7 Noise Control System .............. 6-1 9 .-Identification, ............................ 6-95 Oil .(See "Oil") Overheating ................................. 5-9 Running While Parked ............. 2-35 Starting ............................ 2.12, 2-1 5 Equipment, Add-on ...................... 6-69 Exhaust System ................ 2.34, 6-65

Fan Noise ...................................... 5-1 7 Filter . Replacement Chart ............ 6-99 Finish Care ............................................ 6-88 Damage ..................................... 6-90 Fluid Automatic Transmission ........... 6-33 Brake .......................................... 6-49 Coolant ............................ 5-1 2. 6-42 Front Axle .................................. 6- 40 Hydraulic Clutch ....................... 6-37 Leak Check ................................ 6-52 Manual Transmission ................ 6-36 Odameter Power Steering ............ 1 ............ 6-46 Radiator ....................................... 5-1 4

Rear Axle .................................. 6-41 Recommended Fluids .............. 7-25 . Transfer Case ............................ 6-39 Windshield Washer. ................. 6-48 .................................... Fog Lamps 2-54 Four-wheel Drive ............... 2.36, 6-39 Transfer Case ................ .2-37, 6-39 Front Axle ................................. 6-40 ..................... 6.6 Fuel (Diesel Engines) Cold Weather Operation ............ 6-7 Filter Replacement ........ 6-1 1, 6.13, 6-99 Fuel Requirements ..................... 6-6 Gage ........................ ; ................. 2-87 Running Out Of ........................ 6-10 Tank Capacity ........................... 6-97 Water in Fuel .............................. 627 Fuel (Gasoline Engines) ................. 6-4 Filling Your Ta'nk ....................... 6-16 Foreign . Countries ..................... 6-15 Gage .......................................... 2-87 ......... 6-5 Gasolines for Cleaner Air Fuses and Circuit Breakers ............................ 6-64, 6-1 01 * . Fuse Block ................................ 6-65 Headlights .................... 6.64, 6-100 Power Windows and Other ......... 6.64, 6-100 Power Options Trailer Wiring Harness .. 6.64, 6-1 00 . Windshield Wipers ...... 6-64, 6-100

A- -.

. . f

Gages ............................................ Coolant Temperature Gage Fuel Gage .................................. Odometer ................................... Oil Pressure Gage ..................... Speedometer. ............................ Tachometer ..................... ........................... Trip Voltmeter ...................................

2.87 ..... 2-88 2-87 2-76 2-89 2-76 2.76, 2-78 2-77 2-90

9-3

. . .

INDEX

Halogen Bulbs .............................. 6-55 Hazard Warning Flashers .............. 5-2 Head Restraints .............................. 1-5 Headlights .......................... 2.53. 6-55 Composite .................................. 6-56 Halogen ..................................... 6-55 High Beam Indicator Light ...... 2-85 High-Low Beam ........................ 2-44 Reminder ................................... 2-54 Sealed Beam ............................. 6-55 Heating System (with NC) ........... 3-5 Rear Window Defogger ............. 3-8 System Controls ......................... 3-6 Heating System (without AIC) ..... 3-4 Fan Knob ..................................... 3-4 Function Lever ............................ 3-4 Rear Window Defogger ............. 3-8 Temperature Lever ...................... 3-4 Highway Hypnosis ........................ 4-46 Hitches ........................................... 4-58 Hood Checking Under ........................ 6-17 Latches and Hinge ................... 6-53 Release ...................................... 6-1 7 Horn ............................................... 2-41 Hydraulic Clutch ........................... 6-37 Grease Fitting ............................ 6-39 Hydro-Boost System (Hydraulic Pump) ..................... Hydroplaning .................................

6-50 4-39

If You’re Stuck In Sand. Mud. Ice or Snow .............................. 5-33 Ignition Switch .............................. 2-1 0 Inflation-Tire Pressure ................. 6-73 Instrument Panel ............... 2-70. 2-76 Diesel Tach Cluster .................. 2-75 Standard Cluster ............ 2-72, 2-73

9-4

Jack Storage ...................... Jump Starting ................................

5.19. 5-31 5-3

Key Release Lever ....................... 2-11 Keys ................................................. 2-3

Lights .............................................

2-53 Brake System Warning ............ 4-18 Bulb Replacement ......... .6-54, 6-98 Cargo Lamp .................... 2-58, 6-61 Charging System Light ........... 2-82 Check Gages Light .................. 2-84 Dome Lights ............................. 2-56 Fender ........................................ 6-59 Fog Lamps ................................ 2-54 Glow Plugs Light ........... 2-16, 2-81 Front ParkinglTurn Signal ........ 6-57 Indicator ..................................... 2-78 Headlights (See “Headlights”-) Low Coolant Warning .............. 2-81 Malfunction Indicator .... 2-83, 6-66 Operation ................................... 2-43 Reading ..................................... 2-57 Service Engine Soon ..... 2-83, 6-66 Service Fuel Filter .................... 2-80 Side Marker .............................. 6-58 Rear ................................. 6-62, 6-63 Replacement Chart .................. 6-98 Roof Marker .............................. 6-60 Tailgate Marker ......................... 6-60 Underhood Reel Lamp ............ 2-58 Loading Your Vehicle ........ 4-26, 6-67 Truck-Camper ............................ 6-70 Lubrication ..................................... 6-52 Accelerator Control System .... 6-52 Body ........................................... 6-53 Constant Velocity Joints ......... 6-53 Front Axle ................................. 6-40 Front Shock Absorbers ........... 6-51 Front Suspension and

Steering Linkage ................... 6-51

S

Safety Belts .................................. 1-1 1 Adults ........................................ 1-1 8 Center Passenger Position ...... 1-26 Cleaning ..................................... 6-87 Checking Restraint System ..... 1-52 Child Restraints ........................ 1-37 Children ..................................... 1-35 Driver Position .......................... 1-1 8 Extender .................................... 1-52 Lap Shoulder ............................. 1-19 Larger Children .......... : .............. 1-50 Proper Wear .............................. 1-1 8 Questions and Answers .......... 1-1 6 Rear Seat Passengers ............. 1-29 Reminder Light ......................... 1-1 7 Replacing After a Crash .......... 1-53 Right Front Passenger Position .................................. 1-25 ..... 1-36 Small Children and Babies Use During Pregnancy ............. 1-24 Why They Work ........................ 1-13 Safety Chains ............................... 4-58 Safety Warnings and Symbols ..... 0-2 Scheduled Maintenance Services ................ 7-3, 7-4, 7-18 Controls ........................................ 1-2 Easy Entry Seat .......................... 1-8 Latches .............................. 1-5, 1-10 Manual Front ............................... 1-2 Power Driver’s ............................ 1-3 Rear .............................................. 1-9 Reclining ..................................... 1-3 Service Do-It-Yourself ............................... 6-3 Parts Identification Label ......... 6-94 Publications ........................ 8-6, 8-8 Replacement . Parts and

Seats

Filter Recommendations ...... 6-99 Service Engine Soon Light ................................

2-83, 6-66

Service Station Checks ............... 7-28 Shift Indicator Light .......... 2.27. 2-85 Shifting Into Park ........................ 2-30 ...... 6-51 Single Belt Accessory Drive Sliding Rear Window .................. 2-40 Spare Tire ..................................... 5-20 Pickup Bed Mourrting .... 5.23. 5-32 Removal ..................................... 5-21 Storage ...................................... 5-31 Specification Charts .................... 6-95 Speedometer ................................ 2-76 Starting Your Diesel Engine ....... 2-15 Starting Your Gasoline Engine ... 2-12 Steering ......................................... 4-19 Column Shift Lever .................. 2-31 In Emergencies ........................ 4-21 Storage Compartments ............... 2-63 Console ........................... 2.64. 2-65 Glove Box ................................. 2-63 Other .......................................... 2-68 Sun Visors .................................... 2-61 Swing-Out Windows .................... 2-40

Tachometer ........................ 2-76, 2-78 Tailgate ............................................ 2-8 Theft ................................................ 2-9 Thermostat .................................... 6-46 Tilt Wheel ..................................... 2-41 Tires ............................................... 6-72 Balancing ................................... 6-82 Chains ........................................ 6-84 Changing a Flat ............. 5-17, 5-23 Flat ............................................. 5-17 .... 5-24 Hub CapsNVheel Nut Caps Inspection/Rotation ........ 6-78. 6-79 Loading ...................................... 6-67 New ................................. 6-80. 6-81 Pressure ..................................... 6-73 Spare (See “Spare Tire”) Underbody Carrier ................... 5-21 . 6-81 Uniform Tire Quality Grading

9-6

Towing

A Trailer ...................................... 4-55 Following Distance ................... 4.59 Maintenance .............................. 4-61 Recommendations ................... 6-72 Turn Signals .............................. 4-59 Traffic Lights ................................... 4-8 .............................. Trailer Brakes 4-58 Wiring Harness .............. 2.91, 6-64 Trailering Package ........................ 6-69 Transfer Case ..................... 2.37. 6-39 Transmission

Automatic .................................. 2-2 1 Five-Speed Manual ........ 2.24. 2-25 Fluid ................................ 6.33. 6-36 Fluid. To Add ................. 6.35. 6-37 Four-wheel

(See “Four-Wheel Drive”)

Manual Shift Speeds Shift Light .................................. Torque Lock (Automatic

............... 2-28 2-27 Transmission) ............. 2.30. 4-51 Trip Odometer ............................... 2-77 Turn SignaVMuItifunction Lever .. 2.42

Turn SignaVLane Change

Indicator ......................

2.43. 2-86

Vehicle

Damage Warnings ...................... 0-3 Identification Number ............... 6-93 Loading ...................................... 4-26 Symbols ...................................... 0-4 Ventilation System ......................... 3-2 Air Vents ...................................... 3-3 Tips ............................................... 3.2 Voltmeter ....................................... 2-90

Wheels Alignment and

Warning and Indicator Lights .... 2-78 5-3

Devices. Other ............................ Tire Balance .................................... 6-82 Aluminum .................................. 6-89 Hub Caps and Wheel Nut Caps ..................... 5-24 Nut Torque ..................... 6.51. 6-95 Replacement ............................. 6-83 Used Replacement ................... 6-83 Windows ........................................ 2-39 Sliding Rear .............................. 2-40 Swing-Out .................................. 2-40 Windshield Washer ...................... 2-46 Washer Fluid ............................ 6-48 Winter Driving .............................. 4-52 Wipers,

Windshield ........ 2-45, 6-64, 6-100 Blade Chatter ............................ 6-88 Blade Inserts ............................ 6-52 Cleaning Blades ........................ 6-88

9-7

NOTES

rn

O w n e r ' s M a n u a l

THE STRENGTH OF EXPERIENCE.

INTRODUCTION

1993 Sierra Owner’s Manual

be information

all these publications carefully. This will

In some vehicles, there can

is also a GMC Truck Warranty and Owner

Welcome This manual was prepared to acquaint you with the operation and maintenance of your 1993 GMC Truck or Chassis, and to provide important safety information. There Assistance Information booklet. manuals from other manufacturers like body builders or special equipment companies. We urge you to review help you enjoy safe and trouble-free operation When it comes to service, keep your vehicle best and invites you to return warranty period. Remember, if you have a concern and need help handling satisfaction see the procedure in Section and Owner Assistance Information booklet. Thanks for choosing a GMC Truck product. We value you as a member of the GMC Truck family. We want to assure you of our continuing interest your pleasure and satisfaction with your vehicle.

in mind that your GMC Truck dealer knows

for all of your service needs

8, or in the GMC Truck Warranty

both during and after the

of your vehicle.

it to your

is interested in your complete satisfaction. Your dealer

in

GMC Truck Division

General Motors Corporation

Pontiac, Michigan

@Copyright 7992 General Motors Corporation, GMC Truck Division.

All Rights Reserved

Second Edition

Printed in USA

so it

If you sell the

in your vehicle,

in it so the new owner can use it.

Please keep this manual if you ever need it when you’re on the road.

Important Notes to Owners and Drivers . . . .About This Manual: will be there vehicle, please leave this manual This manual includes the latest information at the time reserve the right to make changes in the product after that time without further notice. For vehicles first Motors of Canada Limited” For GMC Truck Division whenever this manual. . . . .For Canadian Owners Who Prefer a French Language Manual: Aux proprietaires canadiens: Vous pouvez vous procurer un exemplaire de guide en francais chez votre concessionaire ou au DGN Marketing Services Ltd., 1500 Bonhill Rd., Mississauga, Ontario L5T 1C7.

it was printed. We sold in Canada, substitute the name “General it appears in

ce

GENERAL MOTORS, GM, the GM Emblem, GMC and SlERRA are registered trademarks of General Motors Corporation.

ii

Model Reference This manual covers these models.

TYPE